Microstructure based flow curve modeling of high-mn steels with twip and trip effect

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Microstructure based flow curve modeling of high-mn steels with twip and trip effect

Raphael Twardowski, Ulrich Prahl

IEHK RWTH Aachen, Intzestrasse 1, 52071 Aachen.

DOI:

https://doi.org/10.7494/cmms.2012.3.0390

Abstract:

In the present work a microstructural model based on representative volume elements (RVE) is proposed for high manganese steels with TWIP and TRIP effect. The polycrystalline structure is generated by spatial discretization of the RVE in three-dimensional Voronoi tessellations. For the hardening behavior a constitutive material model is used based on the evolution of dislocation, twin and epsilon-martensite density. The plastic deformation is investigated numerically using periodic displacement boundary conditions. In addition to the parameters of temperature and microstructure the influence of the chemical heterogeneity is investigated. The experimental verification of the numerical results is done by uniaxial tensile tests on flat tensile specimens.

Cite as:

Twardowski, R., & Prahl, U. (2012). Microstructure based flow curve modeling of high-mn steels with twip and trip effect. Computer Methods in Materials Science, 12(3), 130 – 136. https://doi.org/10.7494/cmms.2012.3.0390

Article (PDF):

Keywords:

High manganese steels, Microstructure, Representative volume element, Twinning, Phase transformation

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